Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Comparison of cone-beam computed tomography (CT) images and planning CT images of an NPC patient. The top and bottom images are cone-beam CT images and planning CT images, respectively. (a), (b) and (c) are images obtained in the sagittal, coronal and transverse planes, respectively.
